32 roadster rear window frame

[BoxCar Tom]

Anyone have personal experience installing an original 1932 Ford roadster rear window frame? How did you avoid creating an inside out ding on the outside frame piece? I have the early version frame with the thick glass. My uph guy was afraid of installing it for fear of causing damage. He feels that the glass is too thick and there was not enough top material to squeeze everything together without dinging the frame. Appreciate the help.

Going on 20 years with the back frame on a shelf in the family room.